Medical perfusion treatment instrument and use method thereof

Abstract

The invention relates to the technical field of medical instruments, in particular to a medical perfusion treatment instrument which comprises a needle cylinder, a handle, a needle head and a medicine adding box, a piston head is slidably mounted in the needle cylinder and fixedly connected with an inner pushing tube, the inner pushing tube is sleeved with a main pushing outer tube, and one end of the main pushing outer tube is in abutting connection with the side wall of the piston head; the other end of the main pushing outer pipe penetrates through the handle and is fixedly connected with a limiting plate, the limiting plate is driven by a first driving assembly to move horizontally, a driving lead screw is transversely arranged in the main pushing outer pipe, a lead screw nut is fixedly inserted into the end of the inner pushing pipe and arranged on the driving lead screw in a sleeving mode, and the driving lead screw is driven by a pushing assembly to rotate. The invention further provides a use method of the medical perfusion treatment instrument, so that an operator can easily control the perfusion rate, the perfusion pressure and the perfusion amount, and the operation convenience and controllability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a medical perfusion treatment device and a use method thereof. Background Art

[0002] Precision-adjusted perfusion needles have a wide range of applications in the medical and biomedical fields. Accurate perfusion needle technology is very important in various medical procedures, such as in tumor treatment, injection therapy and neurosurgery. Precision perfusion needles can ensure that drugs or therapeutic substances can be delivered exactly to the required area, thereby improving treatment effectiveness and reducing adverse reactions.

[0003] However, most of the infusion needles on the market currently achieve the purpose of injection by manually squeezing the piston rod and pushing the piston head in the syringe. However, manual operation can easily cause problems such as uneven infusion pressure and difficult to control the infusion rate. In addition, the existing infusion needles have a single function and cannot achieve the effect of quantitative continuous injection, and cannot meet the accuracy and adjustability required for different treatments. Summary of the invention

[0004] The object of the present invention is to provide a medical perfusion treatment device and a method of using the same to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a medical perfusion treatment device, comprising a syringe, a handle, a needle and a medicine filling box, wherein a liquid inlet tube extending into the syringe is arranged below the medicine filling box, a piston head is slidably mounted inside the syringe, an end of the piston head away from the needle is fixedly connected to an inner push tube, a main push outer tube is sleeved on the outside of the inner push tube, one end of the main push outer tube is in contact with the side wall of the piston head, the other end of the main push outer tube passes through the handle and is fixedly connected to a limit plate, the limit plate is driven by a first drive assembly to move horizontally, and is used to adjust the moving line spacing of the piston head;

[0006] A driving screw is horizontally placed inside the main push outer tube, one end of the driving screw is fixedly connected to the limit plate, the other end of the driving screw extends into the inner push tube, a screw nut is fixedly inserted into the end of the inner push tube, the screw nut is sleeved on the driving screw, and the driving screw is driven by the push assembly to rotate;

[0007] The pushing assembly includes a No. 1 bevel gear, a No. 2 bevel gear, an L-shaped mounting seat, a driven shaft, a driving shaft and a toggle disc. The toggle disc is installed in the handle for limited rotation, and the driving shaft is fixedly inserted on the inner side of the toggle disc. A speed change assembly is arranged on the Y-shaped movable frame for adjusting and converting the driving force of the driving shaft into the driving force of the driven shaft.

[0008] Preferably, one side of the syringe is fixedly connected to the needle, and the other end of the syringe is fixedly connected to the handle. The medicine adding box is fixedly arranged on the upper end surface of the syringe. The inner push tube is limitedly slidably installed in the main push outer tube. The lower end surface of the main push outer tube is provided with a groove to accommodate an L-shaped mounting seat.

[0009] Preferably, the first driving assembly includes a rotating wheel and an active screw, a cylindrical groove is opened inside the syringe, one end of the active screw is fixedly connected to the rotating wheel, and the other end of the active screw passes through the limit plate and the handle in sequence and is inserted into the cylindrical groove, the limit plate and the active screw are rotatably matched, and an internal threaded hole matching the active screw is opened on the handle.

[0010] Preferably, the L-shaped mounting seat is fixedly arranged on the handle, and the L-shaped mounting seat is rotatably mounted with a No. 1 bevel gear and a No. 2 bevel gear that mesh with each other. The No. 1 bevel gear is sleeved on the driving screw, and three groups of transverse grooves distributed in a circular array are opened on the outer wall of the driving screw. A rectangular protrusion inserted into the transverse groove is fixedly arranged on the inner side of the No. 1 bevel gear, and one end of the driven shaft is fixedly connected to the No. 2 bevel gear, and the other end of the driven shaft extends into the interior of the handle and is connected to the speed change assembly.

[0011] Preferably, the speed change assembly includes a vertical tube, a Y-shaped movable frame, a small driven wheel, a medium driven wheel, a large driven wheel, a large power wheel, a medium power wheel and a small power wheel. The small driven wheel, the medium driven wheel and the large driven wheel are all fixed on the vertical tube. The vertical tube is limited and rotated on the Y-shaped movable frame. The driven shaft is inserted in the vertical tube, and three groups of vertical slide grooves are provided on the outer wall of the driven shaft. The inner wall of the vertical tube is protruding with a radial block inserted in the vertical slide groove.

[0012] Preferably, the small driven wheel, the medium driven wheel and the large driven wheel are all fixedly sleeved on the driving shaft, and they are alternately meshed with the large power wheel, the medium power wheel and the small power wheel in sequence.

[0013] Preferably, the handle is provided with a T-shaped slot for accommodating the Y-shaped movable frame, three groups of equidistantly distributed circular holes are provided on both horizontal sides of the T-shaped slot, a placement cavity is provided inside the T-shaped slot, a snap-on assembly is provided in the placement cavity, the snap-on assembly includes a positioning column, a V-shaped spring piece, a push bar, a movable seat, a cylindrical pin, a longitudinal push bar and an arc-shaped spring piece, the V-shaped spring piece is snap-connected in the placement cavity, one end of the positioning column is fixedly connected to the V-shaped spring piece, and the other end of the positioning column extends out of the Y-shaped movable frame and is inserted into the circular hole.

[0014] Preferably, the movable seat is limitedly slidably installed in the Y-shaped movable frame, one end of the pushing bar abuts against the outer wall connected to the V-shaped spring piece, and the other end of the pushing bar is fixedly connected to the movable seat. A rectangular through groove is formed from top to bottom of the movable seat, and oblique grooves are provided on both sides of the rectangular through groove. Cylindrical pins are inserted in the oblique grooves, and the cylindrical pins are fixedly connected to the longitudinal push bar. The longitudinal push bar extends out of the Y-shaped movable frame and is fixedly connected to the arc-shaped spring piece. The end of the arc-shaped spring piece is fixedly set on the upper end wall of the Y-shaped movable frame.

[0015] Preferably, the lower half of the handle is provided with an incomplete cylindrical cavity for accommodating the toggle disc, spherical clamping blocks are movably mounted at the upper and lower ends of the incomplete cylindrical cavity, and multiple groups of clamping holes distributed in a circular array are provided on the upper and lower surfaces of the toggle disc.

[0016] A method for using a medical perfusion treatment device, the method comprising the following steps:

[0017] S1: First, the handheld rotating wheel drives the active screw to rotate forward and reverse, pushing the limit plate close to or away from the handle, so that the main push outer tube drives the piston head, the inner push tube and the driving screw to move horizontally. The cavity formed by the final stop position of the piston head and the side wall of the syringe is the injection capacity of the liquid medicine;

[0018] S2: Then, the arc-shaped spring piece is pressed downward to release the limiting effect on the Y-shaped movable frame, and then the Y-shaped movable frame is moved upward or downward as a whole. When the Y-shaped movable frame moves upward, the medium-sized driven wheel is meshed with the medium-sized power wheel, and the speed of the driven shaft is the same as that of the driving shaft; when the Y-shaped movable frame moves downward, the large-sized driven wheel is meshed with the small-sized power wheel, and the speed of the driven shaft is less than that of the driving shaft; thereby, the purpose of changing the injection rate is achieved;

[0019] S3: Finally, turn the dial disc to make the dial disc drive the driving shaft to rotate, and the driving shaft drives the driven shaft to rotate through the speed change assembly. Under the cooperation of the second bevel gear, the first bevel gear, the driving screw and the screw nut, the inner push tube drives the piston head to move toward the direction of the needle, thereby pushing the medicine into the needle and out.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention achieves the purpose of changing the movement distance of the piston head by setting a driving component to push the limit plate to move horizontally, so that the perfusion needle can perform continuous quantitative injection, reducing the tedious process of frequent replacement of syringes and multiple injections, and improving the injection efficiency.

[0022] 2. The present invention can convert the single rotation speed of the driving shaft into the alternating use of three rotation speeds of low speed, uniform speed and high speed of the driven shaft through the design of the vertical tube, Y-shaped mobile frame, small driven wheel, medium driven wheel, large driven wheel, large power wheel, medium power wheel and small power wheel, so that the operator can easily control the perfusion rate and perfusion pressure, and can achieve high-precision perfusion operation and flexible adjustment function. In addition, since the dosage and injection speed of the drug are precisely controlled, the perfusion needle can improve the effectiveness of the drug and ensure that the drug can be accurately injected into the part where the patient needs it.

[0023] 3. By arranging the positioning column, V-shaped spring piece, pushing strip, moving seat, cylindrical pin, longitudinal pushing strip and arc spring piece and using them in conjunction with three groups of round holes, the Y-shaped moving frame can be positioned at three specific positions, so that different models of driven wheels and power wheels can be stably engaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the result of the present invention.

[0025] Figure 2 It is a schematic diagram of another viewing angle of the structure of the present invention.

[0026] Figure 3 It is a schematic cross-sectional view of the structure of the present invention.

[0027] Figure 4 Schematic diagram of the internal components of the present invention.

[0028] Figure 5 It is a schematic diagram of the driving screw, the Y-shaped moving frame and the shifting disc in the present invention.

[0029] Figure 6 It is a schematic diagram of the driving screw, L-shaped mounting seat and driven shaft in the present invention.

[0030] Figure 7 It is a connection diagram of the speed change assembly, the Y-shaped moving frame and the shifting disc in the present invention.

[0031] Figure 8 It is a schematic diagram of the speed change assembly and the Y-shaped moving frame in the present invention.

[0032] Fig. 9 It is a schematic diagram of the speed change assembly in the present invention.

[0033] Fig.10 It is an exploded schematic diagram of the clamping assembly in the present invention.

[0034] In the figure: syringe 1, handle 2, needle 3, medicine adding box 4, liquid inlet tube 5, piston head 6, inner push tube 7, screw nut 8, driving screw 9, horizontal slide groove 901, main push outer tube 10, limit plate 11, rotating wheel 12, active screw 13, No. 1 bevel gear 14, rectangular protrusion 1401, No. 2 bevel gear 15, L-shaped mounting seat 16, driven shaft 17, vertical tube 18, Y-shaped moving frame 19, small driven wheel 20, medium driven wheel 21, large driven wheel 22, large power wheel 23, medium power wheel 24, small power wheel 25, driving shaft 26, toggle disc 27, card hole 2701, spherical card block 28, positioning column 29, V-shaped spring piece 30, push strip 31, moving seat 32, inclined groove 33, cylindrical pin 34, longitudinal push strip 35, arc spring piece 36. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 10 The present invention provides a technical solution: a medical perfusion treatment device, comprising a syringe 1, a handle 2, a needle 3 and a medicine adding box 4, a liquid inlet tube 5 extending into the syringe 1 is arranged below the medicine adding box 4, a piston head 6 is slidably installed inside the syringe 1, an end of the piston head 6 away from the needle 3 is fixedly connected with an inner push tube 7, the outer part of the inner push tube 7 is sleeved with a main push outer tube 10, one end of the main push outer tube 10 is in contact with the side wall of the piston head 6, the other end of the main push outer tube 10 passes through the handle 2 and is fixedly connected with a limit plate 11, the limit plate 11 is driven by the first drive assembly to move horizontally, and is used to adjust the moving line spacing of the piston head 6;

[0037] A driving screw 8 is horizontally placed inside the main push outer tube 10, one end of the driving screw 8 is fixedly connected to the limit plate 11, and the other end of the driving screw 8 extends into the inner push tube 7. A screw nut 9 is fixedly inserted at the end of the inner push tube 7. The screw nut 9 is sleeved on the driving screw 8. The driving screw 8 is driven by the pushing assembly to rotate;

[0038] The pushing assembly includes a No. 1 bevel gear 14, a No. 2 bevel gear 15, an L-shaped mounting seat 16, a driven shaft 17, a driving shaft 26 and a dial disc 27. The dial disc 27 is installed in the handle 2 for limited rotation. The driving shaft 26 is fixedly inserted on the inner side of the dial disc 27. A speed change assembly is provided on the Y-shaped movable frame 19 for adjusting the driving force of the driving shaft 26 and converting it into the driving force of the driven shaft 17.

[0039] refer to Figure 4The present invention achieves the purpose of changing the movement line of the piston head 6 by setting a driving component to push the limit plate 11 to move horizontally, so as to enable the perfusion needle to perform continuous quantitative injection, reduce the tedious process of frequent replacement of syringes and multiple injections, and improve injection efficiency.

[0040] One side of the syringe 1 is fixedly connected to the needle 3, and the other end of the syringe 1 is fixedly connected to the handle 2. The medicine adding box 4 is fixedly arranged on the upper end surface of the syringe 1. The inner push tube 7 is limitedly slidably installed in the main push outer tube 10. The lower end surface of the main push outer tube 10 is provided with a groove for accommodating the L-shaped mounting seat 16.

[0041] The first driving assembly includes a rotating wheel 12 and an active screw 13. A cylindrical groove is opened inside the syringe 1. One end of the active screw 13 is fixedly connected to the rotating wheel 12. The other end of the active screw 13 passes through the limiting plate 11 and the handle 2 in sequence and is inserted into the cylindrical groove. The limiting plate 11 and the active screw 13 rotate in coordination. The handle 2 is penetrated by an internal threaded hole that cooperates with the active screw 13.

[0042] Specifically, the hand-held rotating wheel 12 drives the active screw 13 to rotate forward and reversely, and under the rotational action of the inner and outer threads, the limit plate 11 is moved closer to or away from the handle 2, and the limit plate 11 acts on the main push outer tube 10, so that the main push outer tube 10 drives the piston head 6, the inner push tube 7 and the driving screw 9 to move horizontally together;

[0043] The L-shaped mounting seat 16 is fixedly set on the handle 2, and the L-shaped mounting seat 16 is rotatably mounted with a first bevel gear 14 and a second bevel gear 15 that mesh with each other. The first bevel gear 14 is sleeved on the driving screw 9, and three groups of horizontal slide grooves 901 distributed in a ring array are opened on the outer wall of the driving screw 9. A rectangular protrusion 1401 inserted into the horizontal slide groove 901 is fixedly set on the inner side of the first bevel gear 14, and one end of the driven shaft 17 is fixedly connected to the second bevel gear 15, and the other end of the driven shaft 17 extends into the interior of the handle 2 and is connected to the speed change assembly.

[0044] Furthermore, by providing a rectangular protrusion 1401 and cooperating with the transverse slide groove 901, the first bevel gear 14 is axially oriented so that the first bevel gear 14 always rotates together with the driving screw 9;

[0045] The speed change assembly includes a vertical tube 18, a Y-shaped movable frame 19, a small driven wheel 20, a medium driven wheel 21, a large driven wheel 22, a large power wheel 23, a medium power wheel 24 and a small power wheel 25. The small driven wheel 20, the medium driven wheel 21 and the large driven wheel 22 are all fixed on the vertical tube 18. The vertical tube 18 is mounted on the Y-shaped movable frame 19 for limited rotation. The driven shaft 17 is inserted in the vertical tube 18, and three groups of vertical slide grooves are provided on the outer wall of the driven shaft 17. The inner wall of the vertical tube 18 is protrudingly provided with radial blocks inserted in the vertical slide grooves.

[0046] Furthermore, through the design of the vertical tube 18, the Y-shaped movable frame 19, the small driven wheel 20, the medium driven wheel 21, the large driven wheel 22, the large power wheel 23, the medium power wheel 24 and the small power wheel 25, the single rotation speed of the driving shaft 26 can be converted into the alternating use of three rotation speeds of low speed, uniform speed and high speed of the driven shaft 17, so that the operator can easily control the perfusion rate and perfusion pressure, and can achieve high-precision perfusion operation and flexible adjustment function. In addition, since the dosage and injection speed of the drug are precisely controlled, the perfusion needle can improve the effectiveness of the drug and ensure that the drug can be accurately injected into the part where the patient needs it.

[0047] The small driven wheel 20 , the medium driven wheel 21 and the large driven wheel 22 are all fixedly sleeved on the driving shaft 26 , and are alternately meshed with the large power wheel 23 , the medium power wheel 24 and the small power wheel 25 in sequence.

[0048] A T-shaped slot for accommodating a Y-shaped movable frame 19 is provided inside the handle 2, and three groups of equidistantly distributed circular holes are provided on both horizontal sides of the T-shaped slot. A placement cavity is provided inside the T-shaped slot, and a snap-on assembly is provided in the placement cavity. The snap-on assembly includes a positioning column 29, a V-shaped spring piece 30, a pushing strip 31, a movable seat 32, a cylindrical pin 34, a longitudinal pushing strip 35 and an arc-shaped spring piece 36. The V-shaped spring piece 30 is snapped into the placement cavity, one end of the positioning column 29 is fixedly connected to the V-shaped spring piece 30, and the other end of the positioning column extends out of the Y-shaped movable frame 19 and is inserted into the circular hole.

[0049] Furthermore, by setting a positioning column 29, a V-shaped spring piece 30, a push bar 31, a movable seat 32, a cylindrical pin 34, a longitudinal push bar 35 and an arc-shaped spring piece 36 for use in conjunction with three groups of circular holes, the Y-shaped movable frame 19 can be positioned at three specific positions, so that different models of driven wheels and power wheels can be stably engaged.

[0050] The movable seat 32 is limitedly slidably installed in the Y-shaped movable frame 19, one end of the pushing bar 31 abuts against the outer wall of the V-shaped spring piece 30, and the other end of the pushing bar 31 is fixedly connected to the movable seat 32. The movable seat 32 has a rectangular through groove running through the upper and lower parts, and oblique grooves 33 are opened on both sides of the rectangular through groove. A cylindrical pin 34 is inserted in the oblique groove 33, and the cylindrical pin 34 is fixedly connected to the longitudinal push bar 35. The longitudinal push bar 35 extends out of the Y-shaped movable frame 19 and is fixedly connected to the arc-shaped spring piece 36. The end of the arc-shaped spring piece 36 is fixedly set on the upper end wall of the Y-shaped movable frame 19.

[0051] The lower half of the handle 2 is provided with an incomplete cylindrical cavity for accommodating the toggle disc 27. Ball blocks 28 are movably mounted at both ends of the incomplete cylindrical cavity. The upper and lower surfaces of the toggle disc 27 are provided with multiple groups of card holes 2701 distributed in a circular array.

[0052] Furthermore, by providing the spherical clamping block 28 for use in conjunction with the plurality of clamping holes 2701 , the axial limit function of the shifting disc 27 can be achieved, so that the operator can better control the rotation speed of the shifting disc 27 .

[0053] When the present invention is used: first, the handheld rotating wheel 12 drives the active screw 13 to rotate forward and reversely, and under the screwing action of the inner and outer threads, the limit plate 11 is moved close to or away from the handle 2, and the limit plate 11 acts on the main push outer tube 10, so that the main push outer tube 10 drives the piston head 6, the inner push tube 7 and the driving screw 9 to move horizontally together; thereby achieving the purpose of adjusting the injection volume;

[0054] When injecting, the lower half of the handle 2 is held and the dial disc 27 is rotated clockwise, so that the dial disc 27 drives the driving shaft 26 to rotate. In this process, the speed of the driven shaft 17 can be adjusted according to actual needs; by squeezing the arc spring piece 36 downward, the arc spring piece 36 is deformed and presses down the longitudinal push strip 35, and the cylindrical pin 34 at the bottom of the longitudinal push strip 35 acts on the inclined groove 33, so that the moving seat 32 is forced to drive the push strip 31 to continuously squeeze the V-shaped spring piece 30, so that the V-shaped spring piece 30 is deformed and pulls the positioning column 29, so that the positioning column 29 moves from the circular The Y-shaped movable frame 19 is pulled out of the hole, thereby releasing the limiting effect on the Y-shaped movable frame 19. At this time, the Y-shaped movable frame 19 is moved upward or downward as a whole. When the Y-shaped movable frame 19 moves upward, the small driven wheel 20 is disconnected from the large driven wheel 23, and the medium driven wheel 21 is connected to the medium power wheel 24. At this time, the driven shaft 17 has the same rotation speed as the driving shaft 26; when the Y-shaped movable frame 19 moves downward, the small driven wheel 20 is disconnected from the large driven wheel 23, and the large driven wheel 22 is connected to the small power wheel 25. At this time, the rotation speed of the driven shaft 17 is less than the rotation speed of the driving shaft 26.

[0055] When the driven shaft 17 rotates, the second bevel gear 15 on it drives the first bevel gear 14 to rotate, and the first bevel gear 14 drives the driving screw 9. The driving screw 9 acts on the screw nut 8, so that the screw nut 8 drives the inner push tube 7 to move toward the direction of the needle 3, so that the piston head 6 pushes the medicine on its front end surface into the needle 3 to flow out.

[0056] A method for using a medical perfusion treatment device, the method comprising the following steps:

[0057] S1: First, the handheld rotating wheel 12 drives the active screw 13 to rotate forward and reverse, pushing the limit plate 11 close to or away from the handle 2, so that the main push outer tube 10 drives the piston head 6, the inner push tube 7 and the driving screw 9 to move horizontally together. The cavity formed by the final stop position of the piston head 6 and the side wall of the syringe is the injection capacity of the liquid medicine;

[0058] S2: Then, the arc-shaped spring piece 36 is pressed downward to release the limiting effect on the Y-shaped movable frame 19, and then the Y-shaped movable frame 19 is moved upward or downward as a whole. When the Y-shaped movable frame 19 moves upward, the medium-sized driven wheel 21 is meshed with the medium-sized power wheel 24, and at this time, the driven shaft 17 and the driving shaft 26 have the same rotation speed; when the Y-shaped movable frame 19 moves downward, the large-sized driven wheel 22 is meshed and connected with the small-sized power wheel 25, and at this time, the rotation speed of the driven shaft 17 is less than the rotation speed of the driving shaft 26; thereby, the purpose of changing the injection rate is achieved;

[0059] S3: Finally, rotate the dial disk 27 so that the dial disk 27 drives the driving shaft 26 to rotate, and the driving shaft 26 drives the driven shaft 17 to rotate through the speed change assembly. Under the cooperation of the second bevel gear 15, the first bevel gear 14, the driving screw 9 and the screw nut 8, the inner push tube 7 drives the piston head 6 to move toward the direction of the needle 3, thereby pushing the medicine into the needle 3 and out.

[0060] This method enables operators to easily control the perfusion rate and pressure, ensuring safety and effectiveness during treatment.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A medical perfusion treatment device, comprising a syringe (1), a handle (2), a needle (3) and a medicine adding box (4), characterized in that: A liquid inlet tube (5) extending into the syringe (1) is arranged below the medicine adding box (4), a piston head (6) is slidably mounted inside the syringe (1), one end of the piston head (6) away from the needle head (3) is fixedly connected to an inner push tube (7), the outer part of the inner push tube (7) is sleeved with a main push outer tube (10), one end of the main push outer tube (10) is abutted against the side wall of the piston head (6), the other end of the main push outer tube (10) passes through the handle (2) and is fixedly connected to a limit plate (11), the limit plate (11) is driven by the first drive assembly to move horizontally, and is used to adjust the moving line spacing of the piston head (6); A driving screw (8) is horizontally arranged inside the main push outer tube (10), one end of the driving screw (8) is fixedly connected to a limit plate (11), and the other end of the driving screw (8) extends into the inner push tube (7). A screw nut (9) is fixedly inserted into the end of the inner push tube (7), and the screw nut (9) is sleeved on the driving screw (8). The driving screw (8) is driven by the push assembly to perform rotational motion; The pushing assembly comprises a first bevel gear (14), a second bevel gear (15), an L-shaped mounting seat (16), a driven shaft (17), a driving shaft (26) and a dial disc (27); the dial disc (27) is mounted in a limited rotation manner in the handle (2); the driving shaft (26) is fixedly plugged into the inner side of the dial disc (27); and a speed change assembly is arranged on the Y-shaped moving frame (19) for adjusting and converting the driving force of the driving shaft (26) into the driving force of the driven shaft (17).

2. A medical perfusion treatment device according to claim 1, characterized in that: One side of the syringe (1) is fixedly connected to the needle (3), and the other end of the syringe (1) is fixedly connected to the handle (2). The medicine adding box (4) is fixedly arranged on the upper end surface of the syringe (1). The inner push tube (7) is limitedly slidably installed in the main push outer tube (10). The lower end surface of the main push outer tube (10) is provided with a groove for accommodating an L-shaped mounting seat (16).

3. A medical perfusion treatment device according to claim 1, characterized in that: The first driving assembly comprises a rotating wheel (12) and an active screw (13). A cylindrical groove is provided inside the syringe (1). One end of the active screw (13) is fixedly connected to the rotating wheel (12). The other end of the active screw (13) passes through the limiting plate (11) and the handle (2) in sequence and is inserted into the cylindrical groove. The limiting plate (11) and the active screw (13) are rotatably matched. An internal threaded hole matching the active screw (13) is provided through the handle (2).

4. A medical perfusion treatment device according to claim 1, characterized in that: The L-shaped mounting seat (16) is fixedly arranged on the handle (2); a first bevel gear (14) and a second bevel gear (15) meshing with each other are rotatably mounted on the upper limit position of the L-shaped mounting seat (16); the first bevel gear (14) is sleeved on the driving screw (9); three groups of transverse sliding grooves (901) distributed in a ring array are opened on the outer wall of the driving screw (9); a rectangular protrusion (1401) inserted into the transverse sliding groove (901) is fixedly arranged on the inner side of the first bevel gear (14); one end of the driven shaft (17) is fixedly connected to the second bevel gear (15); the other end of the driven shaft (17) extends into the interior of the handle (2) and is connected to the speed change assembly.

5. A medical perfusion treatment device according to claim 4, characterized in that: The speed change assembly comprises a vertical tube (18), a Y-shaped moving frame (19), a small driven wheel (20), a medium driven wheel (21), a large driven wheel (22), a large power wheel (23), a medium power wheel (24) and a small power wheel (25); the small driven wheel (20), the medium driven wheel (21) and the large driven wheel (22) are all fixed on the vertical tube (18); the vertical tube (18) is mounted on the Y-shaped moving frame (19) for limited rotation; the driven shaft (17) is inserted into the vertical tube (18); three groups of vertical sliding grooves are provided on the outer wall of the driven shaft (17); and radial blocks inserted into the vertical sliding grooves are protrudingly provided on the inner wall of the vertical tube (18).

6. A medical perfusion treatment device according to claim 5, characterized in that: The small driven wheel (20), the medium driven wheel (21) and the large driven wheel (22) are all fixedly sleeved on the driving shaft (26), and are alternately meshed with the large power wheel (23), the medium power wheel (24) and the small power wheel (25) in sequence.

7. A medical perfusion treatment device according to claim 5, characterized in that: The handle (2) is provided with a T-shaped slot for accommodating the Y-shaped movable frame (19), and three groups of circular holes are provided on both horizontal sides of the T-shaped slot at equal intervals. A placement cavity is provided inside the T-shaped slot, and a clamping assembly is provided in the placement cavity. The clamping assembly comprises a positioning column (29), a V-shaped spring piece (30), a pushing strip (31), a movable seat (32), a cylindrical pin (34), a longitudinal pushing strip (35) and an arc-shaped spring piece (36). The V-shaped spring piece (30) is clamped in the placement cavity, one end of the positioning column (29) is fixedly connected to the V-shaped spring piece (30), and the other end of the positioning column extends out of the Y-shaped movable frame (19) and is inserted into the circular hole.

8. A medical perfusion treatment device according to claim 7, characterized in that: The movable seat (32) is limitedly slidably installed in the Y-shaped movable frame (19), one end of the push bar (31) abuts against the outer wall of the V-shaped spring sheet (30), and the other end of the push bar (31) is fixedly connected to the movable seat (32). The movable seat (32) is provided with a rectangular through groove running through the upper and lower parts, and oblique grooves (33) are provided on both sides of the rectangular through groove. A cylindrical pin (34) is inserted into the oblique groove (33), and the cylindrical pin (34) is fixedly connected to a longitudinal push bar (35). The longitudinal push bar (35) extends out of the Y-shaped movable frame (19) and is fixedly connected to an arc-shaped spring sheet (36). The end of the arc-shaped spring sheet (36) is fixedly arranged on the upper end wall of the Y-shaped movable frame (19).

9. A medical perfusion treatment device according to claim 1, characterized in that: The lower half of the handle (2) is provided with an incomplete cylindrical cavity for accommodating the toggle disc (27), and spherical clamping blocks (28) are movably mounted at both the upper and lower ends of the incomplete cylindrical cavity, and the upper and lower surfaces of the toggle disc (27) are provided with multiple groups of clamping holes (2701) distributed in a ring array.

10. A method of using the medical perfusion treatment device according to claims 1-9, characterized in that: The method comprises the following steps: S1: First, the hand-held rotating wheel (12) drives the active screw (13) to rotate forward and reverse, pushing the limit plate (11) close to or away from the handle (2), so that the main push outer tube (10) drives the piston head (6), the inner push tube (7) and the driving screw (9) to move horizontally together. The cavity formed by the final stop position of the piston head (6) and the side wall of the syringe is the injection volume of the liquid medicine; S2: Then, the arc-shaped spring sheet (36) is pressed downward to release the limiting effect on the Y-shaped movable frame (19), and then the Y-shaped movable frame (19) is moved upward or downward as a whole. When the Y-shaped movable frame (19) moves upward, the medium-sized driven wheel (21) is meshed with the medium-sized power wheel (24), and at this time, the driven shaft (17) and the driving shaft (26) have the same rotation speed; when the Y-shaped movable frame (19) moves downward, the large-sized driven wheel (22) is meshed with the small-sized power wheel (25), and at this time, the rotation speed of the driven shaft (17) is less than the rotation speed of the driving shaft (26); thereby, the purpose of changing the injection rate is achieved; S3: Finally, the toggle disc (27) is rotated, so that the toggle disc (27) drives the driving shaft (26) to rotate, and the driving shaft (26) drives the driven shaft (17) to rotate through the speed change assembly. Under the cooperation of the second bevel gear (15), the first bevel gear (14), the driving screw (9) and the screw nut (8), the inner push tube (7) drives the piston head (6) toward the needle. The needle head (3) moves in the same direction, thereby pushing the liquid medicine into the needle head (3) and flowing out.

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